Harmonic Elimination with Multilevel Inverter Based Hybrid Filter Using Artificial Intelligence Approach

Harmonics in the distribution system are caused by the fast growth of nonlinear loads based on power electronics. Harmonics reduce the quality of the power and the effectiveness of the power system. As a result, getting rid of it is crucial. This study evaluates a hybrid filter based on a cascaded H-bridge multilevel inverter for decreasing source current harmonics in a high-voltage system. The hybrid filter topology includes a double-tuned passive filter and a cascaded H-bridge MLI-based active filter in a shunt at the point of common coupling. To lower the compensation cost, the shunt passive filter suppresses low-order dominant 5th and 7th harmonics, whereas the shunt active filter eliminates high-order harmonics. To increase system performance, an approach based on artificial intelligence is employed to create compensation current and DC link voltage control. Switching pulses for cascaded MLI are produced using a multiband hysteresis current controller. The harmonic distortion in source current (THDi) is measured under different compensation methods. The system response is observed for steady state and dynamic state. The system is developed and evaluated using MATLAB/Simulink.